Stand for bicycles



Feb- 19, 1946. F. w. scHWINN 2,395,148

` STAND FOR BICYCLS Filed Nov. 24, 1943 4 Sheets-Sheet 1 gl, l' .5 D

Feb. 19, 1946. F, w, scHwlNN STAND FOR BICYCLES Filed' Nov. 24, 1943 4Sheets-Sh eet 2 tafel/7gg g J Feb.19,1946. r. w. SCHWINN. 2,395,148

STAND FOR aIcYcLEs Filed Nov. 24, 1945 4 Sheets-Sheet 3 )if C fuga@ Mfg@w@ /Jr Feb. 19, 1946. Ffw. scHwlNN 2,395,148

STAND FOR BICYCLES Filed NOV. 24, 1943 4 Sheets-Sheet 4 Patented eb. 19,1946 UNITED- STATES PATENT GFFICE STAND FOR BICYCLES Frank W. Schwinn,Chicago, lili.

Application November 24;, 1943, Serial No, 511,511

4 Claims.

The-presentnventionrelates to stands for bicycles, and isparticularlyconcerned with' stands of the type usually termedkick-stands, due to the fact that it may be moved into or out of itsoperative position by a kick of the user.

In the kick-stands of the prior art, with which I am familiar, theworking parts are generally exposed to the elements with resultant rapidwear. Due to this fact andthe fact that they cannot be lubricatedwithout gathering dust and dirt, this accumulation of dust and dirtaccelerates the wear because the combination of the dust and dirt withthe-oil acts as an abrasive.

When such a device of the prior art has been lubricated, the dust anddirt on the lubricated parts. presents a situation in which themechanism looks very unsightly and there is always the possibility ofthe dust, dirt and oil getting on the clothing of the user, and as aresult the users dispense with lubrication. This also results in rapidwear and increases the friction involved in the movementv of the standfrom one position to another, so that the rider may resort to drasticaction, such as Violent kicking in the use ofthe device, which alsoserves to shorten its useful life.

One of the objects ofthe invention is the provision of an improvedkick-stand for bicycles in which the mechanism is suitably enclosed sothat it is protected from exposure to the elements and sorthat it may besuitably lubricated-without gath'- ering dust andv dirt on the exteriorof the assembly.

Another object of the invention is theprovision of a kick-stand which isadapted' to be maintained in a well lubricated condition withoutA havingthe lubricantV leak out and cover the exterior ofthe housing so as toeliminate*anypossibility of'dust and dirt getting into the mechanism, orof having the exterior parts ofthe mechanism covered with lubricantwhich would gather dust or dirt.

Another objectof the invention is the provision of a device of the classdescribed which is simple, sturdy and capable of being manufactured at alowcost, so that it may be placed within the means ofa vast number-ofusers.

Another object of the invention is the` provision of an improvedconstruction for kick-stands which can be manufactured for sale as aseparate accessoryor which may be incorporated as a permanent part ofthe bicycle.

held rmly in its operative position andi which may be moved from eitherone or the other of its positions with a minimum amount of effort.

Other objects and advantages of the invention will be apparent from thefollowing description and the accompanying drawings. in which similarcharacters of reference indicate similar parts throughout the severalviews.

Referring to the drawings, of which there areV four sheets,

Fig. 1 is aA fragmentary sectional view taken on a vertical planepassing through' the lower part of a bicycle frame, showing a kick-standattached to the frame embodying the present invention, supporting thebicycle in approximately Vertical position;

Fig. 2 is a fragmentary top plan View with the kick-stand shown in fulllines in its folded or inoperative position, and shown in dotted linesin its extended or operative position;

Fig. 3 is a fragmentary front elevational view ofthe same kick-standshown in Fig. 2;

Fig. 4 is a fragmentary sectional View taken on the plane of line 4-4 ofFig. 2 looking in the direction of the arrows;

Fig.Y 5` is a fragmentary elevational view taken on the plane of theline5 5 of Fig. 4, looking in the direction of the arrows;

Fig. 6 is a fragmentary sectional view taken on the plane of the linet-f of Fig. 4, looking in the direction of the arrows;

Fig. '7 is a fragmentary sectional View taken on the plane of the line'l-l of Fig. 4, looking in the direction of th'e arrows;

Fig. 8 is a view similar to Fig. 2, showing a modified form 0fconstruction;r

Fig. 9 is a fragmentary sectional view taken on the plane of the line9-9 of Fig. 8, looking in the direction of the arrows,and showing thismodifiedv construction Fig. 10 is a fragmentary top plan view of thelhousing showing the cap` which closes theY endof the housing in section;

Fig. 11 is a side elevational view of the housing for this construction;

Fig. 12 is a side elevational View of the cam of Fig. 10;

Fig. 13 is a top plan View of the housing of Fig. 11;

Fig. 14 is a top-plan View of the cam of Fig. 12;

Fig. l5 is a view similar to Fig. 2, showing a second modified form ofconstruction of the kickstand;

Fig. lii is a fragmentary sectional. view taken on the planeof the line`It-It of Fig. 15, lookingV in the direction of the arrows;

Fig. 17 is a fragmentary sectional view taken on the plane of the line|1--I1 of Fig. 16, looking in the direction of the arrows;

Fig. 18 is a fragmentary end elevational view of the mechanism of Fig.16 taken on the plane of the line l'8-I8 of that figure, looking in thedirection of the arrows;

Fig. 19 is an elevational view of the housing for the mechanism of Fig.16;

Fig. 20 is a top plan view of the cam of the mechanism of Fig. 16;

Fig. 21 is a side elevational view of the same cam;

Fig. 22 is a view similar to Fig. 2 of a third modified form ofconstruction showing how the kick-stands may be constructed as separateaccessories to be attached to the conventional bicycle;

Fig. 23 is a fragmentary sectional view taken on the plane of the line23-23 of Fig. 22; looking in the direction of the arrows;

Fig. 24 is a fragmentary sectional view taken on the plane of the line24-24 of Fig. 22, looking in the direction of the arrows.

Referring to Figs. l to '7, 33 indicates in its entirety a bicycleframe, the front of which is shown in order to illustrate theapplication of the invention to a bicycle.

The frame portion shown includes the crank shaft bearing hanger 3|,which is integrally attached to the lower rear fork members 33 and tothe upwardly extending frame member 34 which usually ends in a' saddlepost and the forward extending frame member 35,

The kick-stand is indicated in its entirety by the numeral 36 and itpreferably includes a housing member 31 and the usual prop member orsprag 38 which is movably supported by the housing 31 for movement intothe inoperative or folded position, which is shown in full lines in Fig.2, or into the operative or extended position, which is shown indot-dash lines in that figure.

The housing 31 comprises a tubular metal member which is preferablysubstantially cylindrical and preferably constructed of steel, having acylindrical wall portion 39 and a plane end wall 4D.

The kick-stand is preferably secured to the frame by having its housing31 brazed or welded to the lower sides of the two lower fork members 32,33, the brazing being indicated at 4I, Fig. 3.

The housing 31 extends transversely to the lower rear fork members 32,33, and at such an angle to these fork members that the sprag 38 when itis in the folded position is preferably located immediately adjacent toor substantially under the nearest fork member 33. This angular positionis caused by the fact that it is desirable to have the lower end portion42 of the sprag 38 disposed laterally with respect to the bicycle framewhen the sprag extends downward so that it may better act as a prop, andby reason of the fact that it is desirable to have the sprag foldedcompactly with respect to the frame 33 when it is in the foldedposition.

When the present kick-stand is manufactured and permanently attached tothe frame by brazing or welding or by having the frame provided with anintegral housing portion 31, I prefer to dispense with the usual shorthorizontal member which would otherwise extend from the fork member 32to the frame member 33 immediately to the right of the present locationof the housing 31.

The sprag 38 preferably consists of a rod of steel or the like which ispreferably cylindrical in shape so that portions of it may serve as ajournal without the necessity for further machining. It comprises thelower end portion 42. the column portion 43 and the upper bearingportion 44. The lower end portion 42 is formed by bending the rod at thepoint 45 at an angle which is preferably slightly less than 90 degrees,so that the lower end portion 42 may serve as a foot for supporting thecolumn 43 of the sprag.

The upper bearing portion 44 also extends at an angle to the body 43,being bent at the point 46 at an angle that is preferably slightly morethan 90 degrees.

The assembly preferably includes a cam member 41 which consists of asubstantially cylindrical metal member shaped to fit into a cylindricalbore of the housing 31. Here it is secured by means of a tapered pin 48which passes in at an aperture 49 in thelower side of the housing Fig.6, and out of an aperture 53 of the top side of the housing 31, theseapertures being in alignment and preferably being formed with a tapercorresponding with the pin 4B.

The bore which forms the apertures 49, 50 is located eccentrically withrespect to the tube 31, so that the pin 48 is located just inside thewall 39 in position to engage in a groove 50 in the side of the cammember 41. Thus the pin 48 is adapted to fasten the cam 41 in thehousing 31 and to secure the cam against rotation as Well aslongitudinal movement.

The outer end of the cam 41 may have an annular plane surface 5l and theouter corners at 52 may be rounded. The cam 41 is provided with athrough bore 53 axially located in the cam 41 and adapted to serve as abearing for the upper end portion or trunnion 44 of the sprag.

The right or inner end of the cam 41 is formed with a pair of partiallyspherical grooves 54, Fig. 5, and 55, Fig. 4. Each of these grooves isformed with one abrupt side wall, such as the side wall 56 of the groove54, and the side wall 51 of the groove 55. These side Walls serve asstops for determining the nal position of a transverse pin 58 carried bythe trunnion 44 of the sprag 38.

The pin 58 is preferably of steel and since it is confined in adiametrically located bore 59 in the end portion 44 of the sprag, andalso conlined in the housing 31, it need only have a sliding t in itsbore 59, but if desired it may have a tight frictional fit.

The right end of the cam' 41 is divided by the grooves 54 and 55 intofour quarter portions, two of which project farther in an axialdirection terminating in the plane surface 60.

The depth of the grooves 54, in an axial direction with respect to theend surfaces 60 and 6I is preferably slightly less than the diameter ofthe pin 58, so that the thrust washer 63 will have its end surface 62engaging the adjacent side of the pin 58 to hold it in its groove,rather than engaging the end portions 60, 6| of the cam 41.

Other diametrically opposite end surfaces 64, 65 of the cam 41 arelocated inwardly, closer to the bottom, that is, the left side ofgrooves 54, 55 so that there will be an open space or slot 65 betweenthe washer 63 and the annular end surfaces 64, 65 on the cam. In otherwords, the grooves 54 and 55 have a side wall which is less of anobstruction to the lateral movement of the pin 584 on thesid'es of thegrooves. whichborder' the slot 6B.

TheV surface- 6.1- in` each groove: is` adapted; to act: asa camming.surface' to cam the pin 58.1 int an` axial directionV when. the: spring.is rotated,A

forexample, inthe clockwise direction im Fig. 4 whileftheopposite. sideof each groove acts as a stop f'or inally determining a rotativeposition of the sprag.

The washer 63J is preferably rectangular in'. cross section: andprovided with an outer cylindrical surface 68 having a. sliding t in thebore of housing 31.

The compression'. spring 53 comprises a helical member, the crosssection of which correspondssubstantially toa parallelogram, as thisspring' is provided with' ai cylindrical bore 'ld having a rotating.'fit on the end portion d4 of the sprag and serving asa bearing.

'Ifhe'washer 63 alsor preferably has a cylindrical'. bore 1| for thesame purpose. Both ends orthe helicalv spring 6s preferably have taperedportions 12; so that each end i3 of the spring presents an annular planesurface. One of the endsoffthe sprag engages the end wall of thehousing;` and'. the other end of the sprag engages the` washer 63, the'`spring beingv provided with an initial compression.

The length of: the trunnion @lli of the sprag 38 is such that when thepin 582 is in one of the notches or grooves 54, 55, there. is aclearance between the end 'l5 and the end of the housing 31, sufficientto permit the 5t to cam out of: its groove and ride on the surface 655.

The operation` of thisV embodiment or the invention is as follows:

When the sprag is in the folded position, as shown in Fig. 3, its pin.58' is located in groove 55 where it is retained by the axial thrustthat is. placedy upon the pin E8. washer 63 and trunnion M by'the spring69. The cani el is ofcourse xedly secured in the housing and the housingishxedlysecured. to the frameV and the sprag is then locatedsubstantially near in the rear fork members 33 in such a position thatit cannot engage'thewheel nor is it in position to interferev with thecrank pedals or the feet of the operator. The` foot portion d2preferably projects slightly beyond: the lowerA fork member 33; so thatthe opera-tor can engage it with his foot if hewishes to turn the spragldownward.

When the sprag'is to be used', it may be turned downward by the riderby' using his foot on. the end 42 to exert a'l rotative force on thetrunnion portion Moi' the sprag. This will cause the pin 58. to camagainst the adiacen't surfaces El on the lower side wall of groove 55andthe trunnionl portion 44 will be cammed toward the right as in Fig.4, so that the pin. 53 will rise out of its` groove compressing thespring 59. The sprag may then be rotated on trunnion M, the pin 58sliding cn the surfaces t and 64 until it registers with the groove 54when the sprag will be in the dotted line position of Fig.

The pin 58 will then be forced into the groove 64, the trunnion portionelli moving axially and the sprag will be held in its position by thespring 69, which is the position shown in full lines in Fig. l, wherethe stand is used for holding the bicycle in nearly erect position.

The trunnion portion 44 of the sprag is journaled not only in the bore53, butV cam 61 of washer B3 andv spring 69 also act as bearings, sothat it' has a long bearing surface, The housing portion which containsspring 69 may be packed? except for its end portions.

with grease, leaving; only suicient` ain space sm that". the? trunnion.can move inward as` described'.` and every time that the sprag isturnedv in itsf housing there will be: a tendency for the grease to be;distributed and agitated to'- cause better lubrication.

When the kick-stand is to be folded, the operaztor: may also use hisfoot for pushing it back;to'- the position of Fig. 2; The dotted lineposition of Fig. l is that which the stand assumes when thebicycle issupported by it. The column. I3A of.' the spragv is short enough tocause the frame to tilt so that part of' its weight is borne by theasprag.

Referring to Figs. 8 to` 14, these iigures showf the construction ofamodiedform of kick-stand, the, housing of which maybe. attached totthe:- fra'me in the mannerV previously described; and; the: constructionofV the sprag may also be' sub'- stantially` as previously described,except for the. location of the pin 58.

In this case. the collar member 'i6 is similar to thecam lil, exceptthat it servesV only as a bear"- ing member and it may be spot-weldedorother'- wise secured to theztrunni'onVv portion 'l1 of this-` sprag onthe points 18..

The end wall 'Z9 of the housing 89' has a bore di for passing thetrunnion portion T1 ofA thesprag'7 and the` helical spring 82 reactsagainst'- the end wallv l5!` and' urges the collar 'i6 outward rlinecollar 'it rotates and slides in' the housing: Sil'.

The cam- B3'comprises ahardened metal member which may be of substantialcylindrical'shap-e,

At its left end portion this cam 83, Fig, 144, has an axially project'-ing cylindrical wall' portion 84 that is'adapted to t into acomplementary slot or recess 8-5 which is formed in the end of thecylindrical. walt or" housing .80, Two` suchy portions 84 are provided'on the cam 33v at diametricallyoppositepoints.for-

engagingy the diametrical recesses shownlinthef housing til; Fig. 11.Thus` the cam 83l may be' mounted on thev housing El!)l and relativerotation;-

prevented by thel engagement of the lugs 84 infA recesses S5.

Cam- 83 has a through. bore 86 for passing' the sprag trunnion Tl; uponits outerV face it hastheV grooves 54. 55- and other surface formationsexactly as described with respect to Figs. 4- and' 5:. after receivingrand engaging the pin 81.

PinY 8T is located in a transverse cylindrical herel 88- irr the spragtrunnion immediately adjacent the endlv of the trunnion-and the spring8-2/ haszanv initial compression for urgingK the pinzfi'lI into` thegrooves 54, 55'.

In this case theworking partsv at the rightendV areA preferably enclosedby a sheet metal cap'` 89.'

comprising a sheet metal member having-a cylindricaliwall 9d andY planeend Wall: 9|, and having inwardly pressed tongues 92- engaging in. thegroove t3 between the cam 83 and housing 80; embodiment workssubstantiallyv the same as the preceding one and its parts maylikewise-V be Yasked with grease.

The complete assemblyy includingl housing, and cap- 89. is again weldedto the. bicycle frame` previously described.

In this case. however, the collar 'i6 rotates and. slides with the spragtrunnion 1l.

Referring to Figs. 15' to 2l, these show another modified forni. ofconstruction in which thecam.' is located at the closed end of thehousing and thek collar previously described' is removably lsecured' tothe housing. In this case the collar9'5:

is provided with an annular groove 96, preferably of partially circularcross section and the groove is adapted to receive the legs 91 of aspring-retaining wire 98 of substantial U shape.

The housing 99 has a pair of vertically extending bores |00, one at eachside and each bore is located just inside of the wall of the housing, sothat it may receive the legs 91 of wire 98 when they are located in thegroove 96 of the collar 95.

Wire 98 may have a frictional nt in its bores or it may be so tensionedthat it is held in place.

In this case the end wall |I of housing 99 is provided with a pair ofradially extending slots |02 which may communicate with a through bore|03. The slots |02 are adapted to receive the axially extending lugs |04which act as a key engaging in the recesses |02 to prevent rotation ofthe cam |05 with respect to the housing 99. Cam |05 of this type has itsgrooves 54, 55 formed in the left side of the cam, Fig. 20, Fig. 21, andthe cam is provided with a through bore |06.

In all other respects the left side of this cam is substantially thesame as the right side of the one with respect to Figs. 3 and 4. In thiscase the pin |01 is disposed in a bore |08 of the trunnion portion |09of the sprag, which bore is located inwardly in the end H0 of thetrunnion, so that the trunnion closes the hole |03 in the end wall. Inother embodiments of the invention the trunnion may be shorter and theend wall closed when there is suflicient clearance between the end ofthe trunnion and the end wall.

This modification works substantially the same as the others,but itdiiers from those previously described in that the trunnion |09 movesaxially toward the left when the pin |01 is cammed out of its groovesduring the rotation of the sprag,

Referring to Figs. 22 to 24: These are views which show how the presentkick-stand may be embodied in a construction that can b e attached toany bicycle of conventional construction instead of being permanentlybrazed or welded to the frame. This mode of attachment is applicable toall of the kick-stands previously described and the housing 31 and sprag38 are exemplary of any of these types.

The housing 31 has welded to it a bracket IH which is similar tooppositely disposed loose bracket H2. Each of these brackets hasacentral web portion I3, the web portion being tapered as shown in Fig.22, so that it is adapted to support the partially cylindrical portionsH4, H5 in the proper position to engage the inner and upper cylindricalwall portion of the lower rear fork members 32, 33, which usually spreadrearwardly from the hanger 3|. In the same way the lower bracket I I Iengages the inner and lower surfaces of these fork members and there ispreferably a space I I6 between the two webs H3,

' so that these brackets can be clamped against the fork members withoutthe webs interfering with each other.

The webs H3 of brackets III, H2 are each provided with a pair ofregistering bores H1 for receiving the screw bolts H8. An elongated nutplate ||9 may be located between the web and the housing 31, this platebeing provided with two threaded bores |20 which are located to receivethe threaded ends 2| of the screw bolts H8 when the bolts are located inthe brackets. Nut plate I I 9 is preferably spot-welded to bracket I.The screw bolts H8 are preferably of the type having an elongated head|22, the noncircular portion of which projects suiiciently CII above thebracket 2 so that access may be had by means of an ordinary wrench.

It should be noted that the housing 31 is preferably disposed at such anangle to the brackets III, ||2 that the sprag 38 is properly locatedadjacent the rear fork member 33 when the sprag is in folded position,but in some embodiments of the invention may have their webs II 3substantially rectangular so that a certain amount of angular adjustmentmay be secured by turning the brackets with respect to the rear forkmember 32, 33, but they are clamped in position by means of bolts I I8.

It will thus be observed that I have invented improved forms ofkick-stands in which all of the mechanism may be so enclosed that it maybe packed with grease for continuous lubrication to reduce the wear andkeep the parts in proper operating condition. Lubricated parts are allenclosed so they do not accumulate dust and dirt.

The present kick-stands are similar in construction adopted to bemanufactured with a -rninimum of material and labor, but they are sturdyand capable of being used for a long period of time without thenecessity for repair. They are so attached to the bicycle frame thatthey support the bicycle adequately, yet when they are folded there isno possibility of their getting out of alignment so as to interfere withthe movement of the mechanism of the bicycle or with the feet of theoperator.

The sprag trunnion has a long bearing surface within the cam spring andhousing and since the device is dust proof it can be packed with greaseso that it need not be lubricated for a very long time. All of theworking parts are so enclosed that there is very little possibility ofdust and grime getting into cause any wear, so that the present devicesare adequately protected from the elements and they may be usedindenitely without need for replacement of any parts.

While the kick-stands are preferably permanently attached to the bicycleframe, they may also beprovided with suitable brackets so that they canbe sold as a separate accessory to be secured to any conventionalbicycle.

While I have illustrated a preferred embodiment of my invention, manymodifications may be made without departing from the spirit of theinvention, and I do not wish to be limited to the precise details ofconstruction set forth, but desire to avail myself of all changes withinthe scope of the appended claims.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. A kick-stand for bicycles, comprising a tubular metal housing ixedlysecured to the lower side of the rearwardly extending lower rear forkmembers, a prop having a laterally turned portion at its upper endadapted to serve as a trunnion rotatably mounted in said tubular member,a bearing carried by said tubular member at the end where the trunnionemerges from said tubular member, a transverse metal pin carried by saidtrunnion, a helical spring having a partially cylindrical inner boresurface engaging said trunnion and serving as a bearing, said springhaving an external partially cylindrical surface engaging the inside ofsaid tube, a cam member having a bore for said trunnion and having onits end a pair of grooves for receiving said pin to hold the prop in twopositions, one position being elevated for non-use and the otherposition being depending to serve as a prop for a bicycle, said springengaging said pin and urging said pin into engagement with the groovesof said cam, said tubular housing being substantially enclosed aboutsaid trunnion, pin, bearing, cam, and spring to retain lubricant andexclude dirt.

2. A kick stand unit for bicycles comprising a substantially cylindricalhousing member having one closed end and the other open and having acylindrical bore, the said cylindrical bore being of uniform diameterthroughout, and a combined cam and bearing member located in the openend of said bore, said latter member comprising a cylindrical metalmember provided with a centrally located cylindrical bore and with aninner cam shaped end having a pair of diametrically extending partiallycylindrical grooves located at substantially ninety degrees from eachother, the said grooves being joined on one side by a camming surface ofreduced axial length and on the other side having an axially extendingshoulder, a bicycle stand prop comprising an elongated rod having alaterally bent trunnion portion of cylindrical shape, said trunnionportion being mounted in said bearing and extending into said housingbut terminating short of the closed end thereof, said trunnion portionhaving a transversely extending through pin located in a transverse borefor reception in either of said diametrically extending grooves, andspring means located in said housing and urging said pin into saidgrooves.

3. A kick stand unit for bicycles comprising a substantially cylindricalhousing member having one closed end and the other open and having acylindrical bore, the said cylindrical bore beingV of uniform diameterthroughout, and a cornbined cam and bearing member located in the openend of said bore, said latter member comprising a cylindrical metalmember provided with a centrally located cylindrical bore and with aninner cam shaped end having a pair of diametrically extending partiallycylindrical grooves located at substantially ninety degrees from eachother, the said grooves being joined on one side by a camming surface ofreduced axial length and on the other side having an axially extendingshoulder, a bicycle stand prop comprising an elongated rod having alaterally bent trunnion portion of cylindrical shape, said trunnionportion being mounted in said bearing and extending into said housingbut terminating short of the closed end thereof, said trunnion portionhaving a transversely extending through pin located in a transverse borefor reception in either of said diametrically extending grooves, andspring means located in said housing and urging said pin into saidgrooves, said spring means comprising a helically Wound spring having aninner cylindrical surface engaging said trunnion, and an outercylindrical surface engaging in said housing to provide bearing surfacefor said trunnion substantially throughout the length of said housing.

4. A kick stand unit for bicycles comprising a substantially cylindricalhousing member having one closed end and the other open and having acylindrical bore, the said cylindrical bore being of uniform diameterthroughout, and a combined cam and bearing member located in the openend of said bore, said latter member comprising a cylindrical metalmember provided with a centrally located cylindrical bore and with aninner cam shaped end having a pair of diametrically extending partiallycylindrical grooves located at substantially ninety degrees from eachother, the said grooves being joined on one side by a camming surface ofreduced axial length and on the other side having an axially extendingshoulder, a bicycle stand prop comprising an elongated rod having alaterally bent trunnion portion of cylindrical shape, said trunnionportion being mounted in said bearing and extending into said housingbut terminating short of the closed end thereof, said trunnion portionhaving a transversely extending through pin located in a transverse borefor reception in either of said diametrically extending grooves, andspring means located in said housing and urging said pin into saidgrooves, said spring means comprising a helically wound spring having aninner cylindrical surface engaging said trunnion, and an outercylindrical surface engaging in said housing to provide bearing surfacefor said trunnion substantially throughout the length of said housing,and a Washer interposed between said spring means and said pin forequalizing the thrust on both ends of said pin.

' FRANK W. SCHWINN.

